Garment or ironing press



March 19, 1935.

E. DAVIS GARMENT OR IRONING PRESS Filed Jan. 28, 1930 5 Sheets-Sheet l I N VEN TOR. Z131 ea? Ba iris @MWW ATTORNEYS March 19, 1935. E. DAVIS 1,994,811

- GARMENT OR IRONING PRESS Filed Jan. 28, 1930 5' Sheets-Sheet 2 2 I @v 1* /l'IIIIIJ ///II..

14 29 I N V EN TOR.

. Ernest 17a 211's A TTORNEYS March 19, 1935. E. DAVlS- 1,994,311

GARMENT OR IRONING PRESS 7 Filed Ja'n. 28. 1930 5 Sheets-Sheet a ,rrrom'm's.

March 19, 1935. E. DAVIS 1,994,811

GARMENT OR IRONING PRESS Filed Jan. 28, 1930 5 Sheets-Sheet 4 IN VEN TOR fr eafflazrz's,

ATTORNEYS March 39, 1935, E. DAVIS GARMENT OR IRONING PRESS Filed Jan. 28, 1930 5 Sheets-Sheet 5 IN VEN TOR. fiz zeafflavzs 9 B Y A TTORNEY5 Patented Mar. 19, 1935 UNITED STATES PATENT OFFICE GARMENT R IRONING PRESS Application January 28, 1930, Serial No. 424,081

17 Claims.

This invention relates to pressing machines, as garment and laundry or ironing pressing machines, and particularly to actuating and control mechanism therefor which effects an initial or preliminary closing of the press with little or no pressure between the press jaws and then the final closng of the-press or press jaws under heavy pressure.

The invention has for one of its objects an operator-operate'd controlling or operating member which has a two'step movement, one to preliminarily "close the press and the other to finally close the press and means for holding the operating member at the end of its first step until the press is preliminarily closed and means operated bythe preliminary closing of the press for shifting the holding means out of operative position as the press comes into preliminarily closed positime. An object of this invention is to improve the operating mechanism shown in my copending application 385,795, filed August 14, 1929.

The invention consists in the novel features and in the combinations and constructions hereinafter set forth. and claimed.

In-describing this invention, reference is had to the'accompanying drawings in which like characters designate corresponding parts in all the views.

Figure l is a side elevation,- partly broken away, of a pressing machine embodying my invention, the press being'shown in open position.

Figure 2- i's-a view similar to Figure 1, the press being shown in closed position.

Figure 3" is an enlarged fragmentary view, partly in sectionand partly diagrammatic of the control member and mechanism operated thereby for effecting the preliminary closing of the press.

Figure 4 is an enlarged fragmentary elevation of the means fofholding the operating member or treadle inits position assumed at the end of its first step-and means for shifting the holding means onto)? its operative position as the press moves'into' preliminarily closed position.

Figure 5 isan inverted plan view, partly in section, of parts seen'in Figure 4.

Figure 6' is a fragmentary'elevation similar to Figure 4 showing the parts in theirv position assumed after the holding means has been shifted into its inoperative position, the knock off device being omitted.

Figure 7 is an enlarged fragmentary elevation,

partly broken away, ofthe pry bar for eifectingfinal pressure and-the contiguous portion of the link- -coacting therewith.

Figure 8 is a side view, partly broken away, of parts seen in Figure 7.

The invention comprises, generally, an operator-operated control member having a two step movement, the first step of which effects the preliminary closing of the press and the second step effects the final closing of the press. There is also provided means for stopping the movement of the operating member at the end of its first step and means operated by the preliminary closing of the press for shifting the stopping means out ofits operative position whereby the operating member is free to be operated through its second step to effect the final closing of the press.

The machine may be of any suitable form, size and construction and comprises cooperating pressing elements or jaws, one of which is movable toward and from the other, and mechanism for actuating the movable element. As here illustrated, the press comprises a buck 1 and a head 2 movable toward and from the buck. The buck is mounted upon a bracket or goose neck 3 which in turn is mounted upon the usual frame 4; and the head 2 is as carried by a lever 5 pivoted at 6 between its ends to an upright 7 rising from the frame.

The mechanism for effecting the closing of the press comprises two parts, the first part effecting the preliminary closing of the press or jaws under no or light pressure and the other acting in conjunction with the first to effect the final closing of the press under heavy pressure. The first part of the mechanism is normally out of motion transmitting relation with the second part, and the initial movement of the operating member effects a preliminary closing of the press and brings the first of said motion transmitting parts into motion transmitting relation with the second. The second step in the movement of the operating member elfects the actuation of the second part to effect the final closing of the press under heavy pressure.

The first motion transmitting part 8 is a link pivoted at 10 to the rear end of the lever 5 and the second motion transmitting part 9 is a lever or pry bar pivoted preferably at 12' at its front end to the frame and extending in a horizontal direction rearwardly. The rear end of the pry bar 9 is arranged in the path of the lower end of the link 8. The link 8 is normally out of engagement with the rear end of the lever 9 and is movable into engagement or into motion transmitting relation therewith by the preliminary closing of the press, so that when the lever or pry bar 9 is actuated, the link 8 acts as a thrust link to transmit the motion of the bar 9 to the head carrying lever 5. The link 8 is guided in its movement by a second link 13 pivoted at its lower end at 14 to the frame and at its upper end at 15 to the lower end of the link 8.

As seen in Figures 7 and 8, the rear end of the lever 9 and the lower end of the link 8 are formed with coacting surfaces, preferably wedge shaped in general form. The rear end of the lever 9 has a V-shaped groove 16 and the lower end of the link 8 has a complemental V-shaped end 17. The surface or groove 16 of the lever is of sufficient length to permit the link 8 to engage the groove in a plurality of positions of the link 8 dependent upon such conditions as the thickness of the work and the amount of compression of the padding on the buck.

As seen in Figure 7, the link 13 consists of a rod l3 and a slidable section at the upper end of the rod, this section comprising a sleeve portion 18 slidable on the rod 13 and a bifurcated or yoke portion 19 enclosing a space through which the rear end of the pry bar 9 extends. The bifurcated portions 19 are pivoted at 15 to the lower end of the link 8. The lower end of the sleeve portion normally thrusts against a collar 20 on the link 13. The upward or endwise movement of the sleeve 18 is against the action of a light returning spring 21 surrounding a pin 22, the spring thrusting at one end aga nst a collar 23 on the upper end of the pin and its lower end against a washer 18 seated against a shoulder 18 in the sleeve 18. The rod 13 is hollow and the pin 22 is driven or threaded into the upper end thereof or otherwise fixed therein, all as seen in Figure 7.

' In this embodiment of my invention, the press is preferably preliminarily closed by power and final pressure is applied by the operator. The operating member controls the application of power to the motor for preliminarily closing the press and applies man power to the pry bar or lever 9 for efiecting final pressure.

The motor for effecting the preliminary closing is here illustrated as a cylinder 24 having a piston therein, the rod 25 of which is connected in some manner to the lever 5, it being here shown as pivoted at 26 to the link-8 or a clevis 2'7 at the upper end thereof.

The operating member is here shown as a treadle 28 pivoted at 29 at its rear end to the base of the machine and having a foot plate 30 at its front end. The operating member has also an upwardly extending arm 31 provided with a follower 32 which coacts with a cam surface 33 provided on a cam block 34 secured to the lower side of the rear end of the pry bar or lever 9.

The treadle 28 has a two step operation in which the first step controls the flow of motive fluid, as compressed air, to the cylinder 24, and the other step applies pressure to the pry lever 9 by reason of movement of the follower 32 along the cam surface 33.

The flow of motive fluid to the cylinder 24 is controlled by a suitable two-way valve means, here illustrated as comprising a casing 35 having a normally closed spring-pressed intake valve 36 and a normally open exhaust valve 37 therein. The valves 36 and 37 are connected together by a stem 38 so that they act as a unit. The intake end of the valve casing is connected through a pipe 39 to a suitable source of supply of compressed air. The casing 35 is connected between its ends by a pipe 40 to the intake port 41 of the cylinder. The pipe 40 is both an intake and exhaust pipe.

The valves 36, 37 are operated by means of a lever 42 pivoted at 43 to a bracket 44 which projects from the valve casing. The lever 42 has a follower 45 which coacts with a cam 46 on a vertically movable rod 47 pivoted at 43 to the operating member or treadle 28. The lever 42 carries a spring pressed stem 49 which coacts with the end of the stem 50 of the exhaust valve 37. The valve casing 35 is mountedon a bracket 51 secured to a frame member 52 above the operating member or treadle 28. The bracket 44 carries a guide as a pivoted sleeve 44*- for the rod 4'7.

Whenthe treadle 28 is depressed, obviously the rod 47 will be pulled downwardly causing the cam 46 to push the lever 42 to the left, Figure 3, thus closing the exhaust valve 37 and opening the intake valve 36. Air thereupon enters the cylinder 24 to preliminarily close the press and when the valves are returned to their normal position by the return of the treadle 28 to its starting position, the air will exhaust from the cylinder 24 through the pipe 40,- valve casing 35 and out through the passage controlled by the exhaust valve 37.

The treadle 28 is locked in depressed position by a latch 53 pivoted at 53 to the front end 01' the treadle 28 and above a 'footplate '30.- The latch 53 extends through the foot plate in'position to coact with a fine tooth rack 54 on'the frame. The latch 53 is held out of operative position, and moved out or" its operative position when released, by a spring 55 acting on a lever 56. The latch is moved into operative position by the lever 56 having a foot piece overlying the rear end of the foot plate 30. The lever 56- is mounted on the/same pivot 53 as that upon which the latch 53 is mounted and is bent up to enclose the latch. It extends'downward from its pivot along the latch 53 and the foot piece extends forward from the lower end thereof. A spring 57 is interposed between the lever 56 and the latch, it being lighter than the'spring 55. The lever 56 is connected to the latch 53 by a coupling involving a lost motion connection this being a pin 58 on the upright part of the lever, 56, the pin extending through a hole in the latch and having a head 59 at its end normally spaced from the latch and serving to pick up or contact with the latch and move it away from the rack 54.

When the treadle 28 is depressed, the operation also depresses the foot pieceof the lever 56 and the latch 53 is shifted into ratcheting engagement with the rack 54 thereby locking the treadle and the press in any one of a plurality of depressed positions. The latch is held engaged with'the rack 54 after the operators foot has been removed from the pedal by the friction between the latch and the rack. r

To open the press, the foot piece 30 is depressed momentarily by pressure applied thereto by the operator. The operators foot, however, must be free of the lever 56 so, that the friction between the latch 53 and the rack 54 is released and the lever 56 returns outwardly under the influence of the spring 55 and pulls the latch out of range of the rack, through the pin 58. The press will open under the influence of countersprings 60 upon upward movement of the treadle 28 which permits the valves 36 and 37 to return to their normal position and the air to exhaust from the cylinder 24. r V

The means for limiting the movement of the treadle 28 while the press preliminarily closes and while the link 8 is moving into motion transmitting relation with the pry lever 9, as "here illustrated, comprises a normally straightened toggle consisting of links 65, 66 pivoted together at67' by a stop joint. One link as 65 is pivoted to a fixedpoint as to theframe at 68 andthe other link 66 is pivoted to the arm 31 of the treadle 28 or to any other convenientpart.

One of the joints of the toggle comprises a spring-pressed-lost motion connection for permitting sufficient movement of the treadle 28 to open the intake valve 36 and close the exhaust valve 37. The links 65, 66 are normally-in a straight line, and hence it is obvious that when the lost motion is taken up, further movement of the treadle. 28 will be prevented.

The means which acts to break or fold the toggle links 65, 66 into their position shown in FiguresZ and 6, and thereby permits the treadle 28 to move furtheror into its second step, is operated by the preliminary closing of the press. The breaking means is here shown as consisting of a knock ofi device movable'with the link 8. The knock off device, in theillustrated embodiment, is shown as carried by the guide link 13 or the sleeve portion 18 thereof. The device is preferably an adjustable shoulder 69 mounted on a stem of a screw 70 which threads into a threaded opening 71 on one side of the sleeve section 18 of the link 13. The knock ofi device or shoulder 69 is an eccentric disk which is adjustable about the stem of the screw 70 into different positions in order that it may cooperate to best advantage with a knock off arm 72 which forms an extension of the link 66 of the locking toggle. The shoulder or disk 69 is provided with a radial projection or rib '73 which coacts with a radially grooved surface 74 at the end of a boss 75 on the sleeve 18 and around the hole 71 in which the screw '70 is threaded. The screw '70 with the cooperating rib '73 and grooved surface '74 firmly secures the disk 69 in adjusted position.

One of the pivotal joints of the toggle consisting of the links 65, 66, is a lost motion connection, as a pin-and-slot connection for permitting the initial'or first step movement of the treadle 28 far enough to open the intake valve 36 and close the exhaust valve 37. Air thereupon enters the cylinder 24 and preliminarily closes thepress. As here shown, thepivotal connection between the rear endof the link 66 and the arm 31 of the treadle is a pin-and-slot connection, the link 66, which is tubular, being formed with a slot '78 and the arm 31 with a pin '76 working in the slot; The pin thrusts against a springpressed plunger 77 located within the tubular link 66.

In operation, after the work is laid on the padding on the buck 1, the operator depresses the treadle 28 by pressing on the foot plate 30 thereof with his toe on the foot plate of the lever 56 of the locking mechanism, thus pressing the locking mechanism or the latch 53 thereof against the rack 54. During the depression of the treadle, the latch ratchets over the teeth of the rack 54 until further movement of the treadle is prevented by the pin 76 engaging the end of the slot 78 shown in Figure l, whereupon the latch takes intoone of the teeth of the rack and is held therein by the frictional engagement between the latch and the tooth of the rack. During the first step of the treadle 28, the follower 32 at the end of the arm 31 moves along an idle portion of the cam surface 33 so that no motion istransmitted to the pry bar 9.

However, the first stepv opens the valve 36. and

closes the exhaust valve 37 so that air enters the cylinder 24 and causes the press to move down into a position .close to the buck 1 or against the work on the buck 1 with little or no pressure.

During this preliminary closing of the press, the link 8 is brought from the position shown in Figure 1 into the position shown in Figure 2 or the lower end of the link is brought into juxtaposition to the lever 9 at any one of a plurality of points along the surface 16 of the lever 9. This point is determined by the press head engaging the buck or the work on the buck. Also, during the preliminary closing of the press, the knock off shoulder 69 engages the arm 72 of the toggle link 66 and brings the toggle from the straight or closed position shown in Figures 1 or 4 to open or broken position shown in Figure 2 or 6 so that now the treadle is unobstructed by the toggle and free to be depressed further. Upon further depression of the treadle 28, the follower 32 moves along the cam 33 and boosts or raises the pry lever 69 and hence applies heavy pressure to the head 2 through the link 8.

During this second depression of the treadle, the latch 53 again ratchets over the rack 54 until the treadle is fully depressed when the latch engages and is retained by one of the teeth in the'rack and holds the treadle depressed in any one ofa plurality of positions.

a To open the press, the operator unlocks the latch mechanism by depressing the treadle 28 with his foot off of the foot piece of the lever 56 of the locking mechanism so that the spring 55 of the locking mechanism draws the latch 53 out of engagement with the rack, when the friction between the latch and the rack has been relieved by the slight depression of the treadle 28.

What I claim is:

1. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, mechanism for effecting the closing of the press comprising two parts, one to efiect a preliminary closing of the press and the other acting in conjunction with the first part to effect a final closing of the press, the first part being normally out of motion transmitting relation with the second, means for actuating the movable element to preliminarily close the press and bring said parts into motion transmitting relation, an operator-operated member having a two step movement, one to effect the preliminary closing of the press and the other to effect the final closing of the press when said parts are in motion transmitting relation, means operated by the first step of said member to effect the preliminary closing, means operated by the second step of said member to effect the final closing, a device normally holding said member from additional movement when it reaches the end of its first step, and a knock off device movable with said first part and into engagement with said device to trip the same when said parts come into motion transmitting relation.

2. In a pressing machine, cooperating pressing elements, one of which is movable toward and from the other, mechanism for efiecting the closing of the press comprising two parts, one to effect a preliminary closing of the press and the other aotingin conjunction with the first part to effect a final closing of the press, the first part being normally out of motion transmitting relation with the second part, means for actuating the movable element to preliminarily close the press and bring said parts into motion transmitting relation, an operator-operated member having a two step movement, one to effect the preliminary closing of the press and the other to effect the final closing of the press when said parts are in motion transmitting relation, means operated by the first step of the operator-operated member to effect the preliminary closing, means operated by the second step of said member to eifect the final closing, a device for normally holding said operator-operated member from additional movement when it reaches the end of its first step consisting of toggle links pivoted together by a stop joint, one link being pivoted to a fixed point and the other to the operator-operated member, one of the pivotal points of the toggle being a lost motion connection normally arranged in a straightened position, and a knock off device movable with the first of said parts into coaction with the toggle to fold the same when said parts come into motion transmitting relation.

3. In a pressing machine, a frame, cooperating pressing elements, one of which is movable toward and from the other, mechanism for effecting the closing of the press including a pry bar, and a link pivotally connected to the movable element and normally out of engagement with the pry bar and movable into engagement with the pry bar by a preliminary closing of the press, a treadle lever pivoted to the frame and having an arm coacting with the pry bar, a cam face on the pry bar, a follower on the arm for coacting with the cam face, a stop device for normally limiting the movement of the treadle,

and means movable with said link for tripping.

the stop device during the movement of the link into motion transmitting relation with the pry bar.

4. In a garment or laundry pressing machine in combination cooperative pressing elements; actuating mechanism for moving one of the pressing elements with respect to the other including means for closing the press into preliminary closed position and pry-bar means for applying heavy pressure to the pressing elements; an operator-operated member controlling the actuation of the preliminary closing means during the first part of its movement and actuating the pry-bar means thereafter, a looking device holding the pry-bar means against operation during the first part of the movement of the operator-operated member, and means releasing the locking device upon the pressing elements moving into preliminary closed position.

5. In a garment or laundry pressing machine in combination cooperative pressing elements; actuating mechanism for moving one of the pressing elements with respect to the other including means for closing the press into preliminary closed position and pry-bar means for applying heavy pressure to the pressing elements; cam means actuating the pry-bar, an operatoroperated member controlling the actuation of the preliminary closing means during the first part of its movement and actuating the cam means thereafter, a locking device holding the cam means against operation during the first part of the movement of the operator-operated member, and means releasing the locking device upon the pressing elements moving into preliminary closed position.

6. In a garment or laundry pressing machine in combination cooperative pressing elements;

actuating mechanismfor moving oneof the pressing elements with respect to the other including means for closing the press into preliminary closed position and pry-bar means including a pry-bar for applying heavy pressure to the pressing elements; mechanism for actuating the pry'bar including cam means, and a pedal lever with a cam follower connected thereto for operating the cam means; connections betweenthe pedal lever and the preliminary closing means to actuate the latter during the first part of the movement of'the lever, means locking the pedal lever against operation of the pry-bar before the pressing elements are in preliminary closed position; and lock releasing means operated from the press actuating mechanism as the pressing elements reach preliminary closed position for releasing the pedal lever locking means.

7. In a pressing machine, cooperating pressing elements one of which is movable toward and from the other, an operator-operated member having a two step movement, one to effect the preliminary closing of the press and the other to effect final closing of the press, means operated by the first step of said operator-operated member to effect the preliminary closing of the ress, means operated by the second step of said member to efiect the final closing, a device normally holding said member from additional movement when it reaches the end of its first step, and a knock off device controlled by a part movable with the movable pressing element and movable into engagement with said holding device and releasing the same when the pressing elements have reached preliminary closed position.

8. In a pressing machine, cooperating pressing elements one of which is movable toward and from the other, motor means operatively connected with the movable pressing element, valve means controlling the motor means, an operatoroperated member having a two step movement, means operated by the first step of said operatoroperated member to actuate the valve means and eifect the preliminary closing of the press, means operated by the second step of said operator-operated member to effect the final closing of the press, a device normally holding said operatoroperated member from additional movement when it reaches the end of its first step, and a knock off device coordinated in its movement with the movable pressing element and movable into engagement with said holding device and releasing the same when the pressing elements have reached preliminary closed position.

9. A garment or laundry pressing machine comprising a frame, cooperating pressing elements, actuating mechanism moving one of the pressing elements with respect to the other including fluid motor means closing the press into preliminary closed position, means for applying heavy pressure to the pressing elements, an operator-operated pedal connected with and actuating the heavy pressure means, a valve mechanism mounted upon the frame and connected with the fluid motor means, and connections between the operator-operated pedal and the valve mechanism to operate the latter upon preliminary depression of the former and retaining the valve mechanism operated upon further depression of the pedal to actuate the heavy pressure means irrespective of the relative movement between the valve mechanism and pedal.

pressing jaws one of which is movable toward and from the other;,preliminary closing mechanism actuating. the movable jaw to preliminarily close the press including a motor, motion transmitting connections between:the'motor and the movable jaw, and means controlling thetmovement of the motor; booster means to apply heavy pressure to the movable jaw including a booster actuating part, the booster actuating part operating the control means during the initial portion of its movement, booster locking means holding the booster means against boosting movement, and releasing means operated upon a predetermined extent of movement of the actuating mechanism for releasing the locking means.

11. A pressing machine comprising cooperating pressing jaws one of which is movable toward and from the other; preliminary closing mechanism actuating the movable jaw to close the press including a motor, motion transmitting connections between the motor and the movable jaw, and means controlling the movement of the motor; booster means to apply heavy pressure to the movable jaw including a booster actuating part for operating the booster means, the booster actuating part operating the controlling m ans, booster locking means holding the booster means against boosting movement, releasing means operated upon a predetermined. extent of movement of the actuating mechanism for releasing the locking means, and press locking means holding the movable jaw in closed position.

12. A pressing machine comprising cooperating pressing jaws one of which is movable toward and from the other; preliminary closing mecha nism actuating the movable jaw to preliminarily close the press including a motor, motion transmitting connections between the motor and the movable jaw, and means controlling the movement of the motor; booster means operable to apply heavy pressure to the movable jaw, the booster means being normally disconnected from operative relation with the motion transmitting connections and operative relation being established therewith upon preliminary closing of the press, the booster means including a booster actuating part, the booster actuating part operating the control means during the initial portion of its movement, booster locking means iolding the booster means against boosting movement, and releasing means operated upon a predetermined extent of movement of the actuating mechanism for releasing the locking means.

13. A pressing machine comprising cooperating pressing jaws one of which is movable toward and from the other; preliminary closing mechanism actuating the movable jaw to preliminarily close the press including a motor, motion transmitting connections between the motor and the movable jaw, and means controlling the movement of the motor; booster means operable to apply heavy pressure to the movable jaw, a part of the booster means being controlled by the movement of the motion transmitting connections and moving into operative relation with another part of the booster means upon closing of the press, the booster means including a booster actuating part, the booster actuating part operating the control means during the initial portion of its movement, booster locking means ho1d ing the booster means against boosting movement, and releasing means operated upon a predetermined extent of movement of the actuating mechanism for releasing the locking means.

14. A pressing machine comprising cooperating pressing jaws one of which is movable toward and from theother; preliminary closing mechanism'actuating the movable jaw to preliminarily close the press including a motor,motion" transmitting connections between the motor and the movable jaw, and means controlling the movement or the motor; booster means operable to apply heavy pressure to the movable jaw, the booster means being normally disconnected from operative relation with the motion transmitting connections and operative relation being established upon closing of the press, the booster means including a booster actuating part, the booster actuating part operating the control means during the initial portion of its movement, booster locking means holding the booster means against boosting movement, releasing means operated upon a predetermined extent of movement of the actuating mechanism for releasing the locking means, and press locking means locking the booster actuating part and the press in closed position.

15. A pr ssing machine comprising, cooperating pressing jaws one of which is movable toward and from the other; preliminary closing mechanism actuating the movable jaw to preliminarily close the press including a motor, motion transmitting connections between the motor and the movable jaw, and. means controlling the movement of the motor; booster means operable to apply heavy pressure to the movable jaw, a part of the booster means being controlled by the movement of the motion transmitting connections and moving into operative relation with another part of the booster means upon closing of the press, the booster means including a booster actuating part, the booster actuating part operating the control during the initial portion of is movement, booster locking means holding the booster means against boosting movement, releasing means operated upon a predetermined extent of movement of the actuating mechanism for releasing the locking means, and press locking means locking the booster actuating part and the press in closed position.

16. In a garment or laundry pressing machine in combination, a frame; cooperative pressing elements one of which is movable with respect to the other; operating means for moving the movable pressing element into preliminary closed position; mechanism for applying heavy pressure to the pressing elements including a prybar, and operating mechanism therefor; toggle means connected with a part of the pry-bar openating mechanism and arranged to lock in straightened position to hold the pry-bar operating mechanism against pry-bar operation; a stop to hold. the toggle againts folding when in such position; toggle releasing means controlled by the movement of the operating mechanism and movable into contact with said toggle during the movement of the pressing elements into preliminary closed. position for opening said toggle from straightened position so that it may fold and thus release the pry-bar operating mechanism from locked. position. 7

1'7. A pressing machine comprising, cooperating press ng jaws one of which is movable toward and from the other; preliminary closing mechanism actuating the movable jaw to preliminarily close the press including, a motor, motion transmitting connections between the motor and the movable jaw, and means controlling the movement of the motor; booster means operable to apply heavy pressure to the movable jaw, means controlled by the movement of the motion transmitting 'connections'and moving into operative relation between the booster means and the motion transmitting connections upon closing of the press, the booster means including a booster actu- 5 ating part, the booster actuating part operating the control means during the initial portion of its movement, booster locking means holding the booster means against boosting movement, and releasing means operated upon a. predetermined extent of movement of the actuating mechanism for releasing the locking means.

' ERNEST DAVIS. 

